Inner wheel housings are new and flush to the frame. With the outside lip rolled I have over 14" tire clearance. I had 325/50-15 tires on the car and they cleared easily, but they are not as "square" as the low profile performance tires. With the 295/40-18 I have on there now, which measures 10.9" section width, and a 1/2" spacer I have about 1-1/2" clearance on the outside and 1-3/4" clearance on the inside. A 325/30-19 would fit almost perfect and a 345/30-19 might fit...